flask 添加用户认证API , 客户端用户认证

flask 添加用户认证API , python 客户端用户认证

flask blog 演示项目

Documentation = https://flask.palletsprojects.com/tutorial/
中文Documentation = https://flask.net.cn/
源码 https://github.com/pallets/flask/tree/main/examples/tutorial

修改 auth.py 添加用户认证API

### web 访问授权验证 
@bp.route("/author", methods=("GET", "POST"))
def author():
    """author a user is registered or not"""

    ret = -1

    if request.method == "POST":
        username = request.form["username"]
        password = request.form["password"]
        db = get_db()
        
        user = db.execute(
            "SELECT * FROM user WHERE username = ?", (username,)
        ).fetchone()

        if user is None:
            ret = 1 # "Incorrect username."
        elif not check_password_hash(user["password"], password):
            ret = 2 #"Incorrect password."

        if ret is -1:
            ret = 0  # "author OK"

    jsonRet={
        "status":ret,
        "value":ret
    }

    return jsonRet 

client.py 访问 网站 获取认证结果

其中 url = “http://127.0.0.1:5000/auth/author” 替换为实际的 flask服务器地址
我这里在本机演示，所以是"http://127.0.0.1:5000/auth/author"

import requests
import json
from typing import Tuple

import getpass

def author(username: str, password: str) -> Tuple[bool, str]:
    # 将此URL替换为您要登录的网站的URL
    url = "http://127.0.0.1:5000/auth/author"
    payload = {
        "username": username,
        "password": password
    }
    
    response :requests.Response = requests.post(url, data=payload, headers={"Referer": url})  # 模拟浏览器登陆过程

    print(f"response.url: {response.url}") 
    print(f"response.content: {response.content}")
    print(f"response.status_code: {response.status_code}")

    json_data = json.loads(response.content)
    status = json_data["status"]
    value = json_data["value"]
    print(f"status : {status}")
    print(f"value : {value}")

    if status == 0:
        return {True,"author OK"}
    else:
        return {False,"author Error"}

username = input("请输入用户名：")
# password = input("请输入密码：")
password = getpass.getpass("请输入密码：")

ret,message = author(username, password)
print(f"{ret} {message}")

测试

我这网站用户提前添加
用户名 wmx
密码 123

测试，运行client.py

wmx 123 验证正确：

请输入用户名：wmx
请输入密码：
response.url: http://127.0.0.1:5000/auth/author
response.content: b'{\n  "status": 0,\n  "value": 0\n}\n'
response.status_code: 200
status : 0
value : 0
True author OK

ad ad 验证失败：

请输入用户名：ad
请输入密码：
http://127.0.0.1:5000/auth/author
b'{\n  "status": 1,\n  "value": 1\n}\n'
200
status : 1
value : 1
False author Error

c++ 客户端认证

使用 curl 库 ，参考 mingw 编译 curl ,Qt 工程使用
cJSON 库 ,参考 https://github.com/DaveGamble/cJSON

#include <iostream>
#include <curl/curl.h>
#include <cjson/cJSON.h>

// libcurl回调函数，用于处理接收到的大量数据
size_t write_callback(void *contents, size_t size, size_t nmemb, void *userp) {
    std::string *str = static_cast<std::string*>(userp);
    str->append((char*)contents, size * nmemb);
    return size * nmemb;
}

std::string post(const std::string& url, const std::string& username, const std::string& password) {
    CURL *curl = curl_easy_init();
    if(curl) {
        std::string buffer;

        struct curl_slist *headers = NULL;
        headers = curl_slist_append(headers, ("Referer:" + url).c_str() );

        curl_easy_setopt(curl, CURLOPT_URL, url.c_str());
        curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers);

        std::string postdata = "username=" + username + "&password=" + password;
        curl_easy_setopt(curl, CURLOPT_POSTFIELDS, postdata.c_str());// "username=wmx&password=123"

        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_callback);
        curl_easy_setopt(curl, CURLOPT_WRITEDATA, &buffer);
        // 执行POST请求
        CURLcode res = curl_easy_perform(curl);
        if(res != CURLE_OK) {
            std::cerr << "curl_easy_perform() failed: " << curl_easy_strerror(res) << std::endl;
        }
        // 清理
        curl_slist_free_all(headers);
        curl_easy_cleanup(curl);
        return buffer;
    } else {
        std::cerr << "curl_easy_init() failed" << std::endl;
        return "";
    }
}

///解析JSON数据
int  parseJson(const std::string& jsonStr) {

    int ret = -1;

    // 将JSON字符串转换为cJSON对象
    cJSON* json = cJSON_Parse(jsonStr.c_str());
    // 检查解析是否成功
    if (json == nullptr) {
        std::cerr << "Failed to parse JSON" << std::endl;
        return ret;
    }

    cJSON *status=nullptr;
    cJSON *value=nullptr;
    status = cJSON_GetObjectItemCaseSensitive(json, "status");
    value = cJSON_GetObjectItemCaseSensitive(json, "value");
    if (cJSON_IsNumber(status))
    {
        printf("status: \"%d\"\n", status->valueint);
        ret = status->valueint;
    }
    if (cJSON_IsNumber(value))
    {
        printf("value: \"%d\"\n", value->valueint);
    }

    // 释放cJSON对象的内存
    cJSON_Delete(json);

    return ret;
}


int main(int argc ,char**argv) {

    std::string url = "http://127.0.0.1:5000/auth/author"; // 替换为你要访问的URL   http://example.com
    std::string username = "wmx"; // 替换为你的用户名
    std::string password = "123"; // 替换为你的密码
    std::string response = post(url, username, password);
    if(!response.empty()) {
        int ret = parseJson(response);
        std::cout << response << std::endl;
        std::string msg = ret==0?"web author OK" :"web author error";
        std::cout <<msg<< std::endl;
    } else {
        std::cerr << "Empty response" << std::endl;
    }
    return 0;
}